Analysis of Lapping and Polishing of a Gauge Block

A lapping experiment and performance analysis for the gauge block is given first. Then, the experimental design using the Taguchi method was employed to optimise the polishing parameters. Results showed that the carrier with circular holes produced better surface roughness in the lapping experiment. The analysis of variance (ANOVA) of the polishing experiment found that the removal rate was a function of pressure and speed. This finding agrees with Preston’s equation. The optimum conditions for high removal rate in the polishing experiment are: pressure, 56.27 kPa; concentration, 15%; speed, 200 r.p.m. The optimum conditions for good surface roughness in the polishing experiment are: pressure, 18.75 kPa; concentration, 10%; speed, 150 r.p.m.